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E. BREITLING ETAL A BOOKKEEPING MACHINE l Qxigial Filed Feb. 24. 1925l .Dec. 29, 1931.

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BOQKKEEPING MACHINE originar Filed Feb. 24, 1925y 14 sheets-sheet 5 Dec. 29,-1931. E. BREITLING |:rAL j l 1,339,138y

BOOKKEEPING MACHINE Origxinal Filed Feb. 24, 1925 14-SheetsSheet 6 f O A l l v i I Il i021 IHM Dec. '29, 1931. E. BREITLING ETAL A1,839,138

Q nooxKEEPI'NG Momma 'y origina.;i lFiled Feb. 24,1925 14 Sheets-Sheet 7 ZIJ il 29, 1931. E. BREITLING L u.

laoomuslzzrnwfV MACHINE original Filed. Feb. 24;"1925 14 sheets-sheet` 8 F @MF |11 F .F SNN 1 Dec. 29, 1931.

E. BREITLING ETAL 1,839,138l

ooKKEEPING MACHINE original Filled Feb; 24, 1925 14 sheets-sheet 1o fifa/7 ligj m d 1191 *im 10% Dee.` 29, 1931.

E. BREITLING ET AL 1,839,138

BOOKKEEPING MACHINE Original Filed Feb. 24, 1925 14 Sheets-Sheet 11 109x 7107 9 109x 11W 49 y Il 4 1%! Il WIM 1155 l FH Dec. 29, 1931. E. BRE'lTuNGT-AL 1 1,839,138

BOOKKE'EPING MACHINE original Filed Feb. 2424925 14 sheets-sheet 12 Decf 29, 1931. E. BREITLING |:1 AL l I "1,839,138

` BOOKKEEPING MACHINE Orgingl Filed Feb. 24, 1925 De. 29, 19.31.(vk E. BREITLING E'r/AL i 1,839,138

' BOOKKEEPING MACHINE Original Filed Feb. 1:24;V 1925 14 Sheets-Sheet 14 `Pa`tenled Dec. 29", 1931 UNITED STATES@ PATENT oFFlcE ERNST BREITLING',

'WILHELM BRAUEB, AND KARL AUGUST LEHMANN, 0F ESSEN,

GERMANY, AND BRUNO BOBNXESBEL, DECEASED, LATE OF ESSEN, GEJBMANY, BY

MARTHA BORNKESSEL,

0F ESSEN-ONf-THE-RUHB, GERMANY, ADMINISTRATBIX;

SAID BREITLING, BRAUEB, LEHMANN AND BRUNO "MBNKESSEL ASSIGNOBS A'.IO FRIED KRUPP AKTIENGESELLSCHAFT, 0F ESSEN-ON-THE-BUHB, GERMANY BOOKKEEPING IACHNE.

original application mea February a4, laas, semi no. .1137s, mav in .oei-many nursery as, ism.'

Divided and this application illed September 30,1927. Serial No. 228,196.

Key locking mechanism for book ceepng 'machines The invention relates to a book keeping machine for calculating andrecording a new -state of an amount consisting of an o datate of an account and the amounts received and the character statedl in which the amounts and the operations to be executed by the machine are set by means of keys and are transmitted by a separate drive to the totalizers and to the printing and display mechanism.

The `spirit of the invention consists inthe general common idea of providing` devices which serve for easing the operators eiort of thought inthe largest possible degree and to warrant a reliable control of the transaction both for the oliice and for the customer.

For this purpose the different transactions including an action upon the control totalizers and the display mechanism and record on different impression carriers, are set by as few manipulations as possible, the succession of the setting manipulations required for the different transactions being prescribed to the operator by the machine in a manner recluding error by means of locking mec anisms arranged betwen the several setting means..

With these and incidental objects in view,

the invention consistsl in certain novel fe'atures of construction and combinations of parts, the essential elements of w ich are set forth in appended claims, and form of embodiment of which is hereinafter described with reference to the ydrawings which accompany and form part ofthe spec# icatio'n.`

In these drawings: i

Fig. 1 is a front view of the machine,

Fig. 2 is a section through the machine on line IL-II of Fig. 1;

Fig. 3 is a front View of the amount ential mechanism, Fig'. 4 is a section online IV--IV of Fig. 1,

Fig; 5 is a front view of the special differential mechanism .fior the' selection of the totalizers, i' Fig. 6 is a detail' belonging to Fig. 4,

preferred differ! Fig. 9 is a horizontal section on line -IX--IX of Fig. 7 through the blocking "means ofthe transaction keys, seen from the paid out, and in particular to a machine off' j the account keys `and of the main driving shaft of the machine,

'Fig 13 is a rear View of the arrangement of the account keys,

Figs. .14 to 31 are sections parallel to the rovls of keys of Fig. 7, all seen from the ri t, i

ig. 32 is the elevation of an item counter frame,

Fig. 33 is a detail thereto.

This invention relates more particularly to matter divided from our copending appli'- cation Serial No. 11,373, filed February 24, 1925, for a book keeping machine. This book keeping machine is designed to take up the money transactions between ,an unlmited number of customers and a savings bank 'or bank. Each customer possesses an account number and the transactions in his account `may take place by directly payinin or taking away amounts or by orders. or recording the transactions and the state of the acremaining in the customers hand. The book must be 'presented in the oiiice foryrecording the amounts in consideration. In case this is impossiblefor instance with orders, the record must be made on a later occasion.

For controlling the transactions serves, besides, a control strip on which all the operations necessary for this control of the machine are recorded. A' The machine further hands, upon each transaction, a ticket to the customer whereon all the operations ofthe transaction are recorded. For thedrect control of the set amount there is provided a display mechanism which may be read ofi' both from the front and\rear side of the machine. One of the totalizers of the machine, the main totalizer, is destined for calculating a new state of account consisting of an old state and of the amounts received or paid out. Another totalizer, i. e. the auxlliary totalizer serves for calculating the arithmetic total from the amounts received and paid out in the different accounts of a determined booking period. Other totalizers, i. e. the transaction totalizers serve for controlling the single operations of the main totalizer, while still in further totalizers the amounts paid out and received of certain lines of usiness are added.

For setting the different operations of the machine keys are made use of exclusively, l

some of said keys causing a plurality of operations to be executed simultaneously. These keys are connected by blocking means controlling the mode of each setting operation and the mutual conditions of the different transactions. Owing to these arrangements setting operations cannotbe omitted in a transaction, as the machine cannot be started before all required setting operations have been made. A `certain number of the keys are connected, for control purposes, with item counters.

eluded, requires an operation of the machine 1. General arrangement of the book keeping machine The setting mechanism of the machine (Fig. 1) consists of the amount keys 10,v arranged in the nine rows at the left-hand front part of the machine, of -two rows of special keys 11 and 12, three rows of account totalizer keys 13 and of the motor key 14 at the right-hand front part of the machine. To the keys 13 are allotted the item totalizers 15 and to the six upper keys of the key row 11 are allotted item totalizers 16. The lower front part of the machine is occupied by the print-ing mechanism arranged across the machine (Figs 1 and 4), said mechanism showing at its upper side seven rows of ke s 17 serving for setting the account number w eels. The key 18 is a general releasing key for the keys 17. In the upper part of the machine is arranged the display mechanism which may be read-off both from the frontand rear side of the machine.

The left-hand part of the inner space of l t-he machine is occupied by the amount differential mechanism and the totalizers, see Fig. 2. To the totalizers belong: twentyf seven account totalizers which are superimposed so as to form three groups N1, N 2, N 3 of nine totalizers each (Fig. 2) further: six transaction totalizers united so as to form a Each transaction to be exe-y cuted bythe machine, the total-taking inceived and the 'for the totalizers, the blocking means for thespecial keys and vby the driving mechanism.

2. The modes of record Four different modes of record are capable of being executed by the machine:

I. rlhe ordinary record (record of first order) II. Recording the sub-total from the main totalizer (record of second order);

III. Recording sub-totals and grand-totals from the controlling totalizers (record of third order) g IV. Recording addenda (record of fourth order). I

lil

I. An ordinary record required three different modes of operations of the machine viz: introduction of theold state of account, introduction of the amounts received or paid out, printing the new state of account. The introduction of the old state and the impression of the new state each requires an opera tion of the machine, While in introducing the amounts received and paid out a separate operation is required for recording each amount received or paid out.

The mode of operation of the main totalizer and the simultaneous throwing-in of a controlling totalizer of the group S (Fig. 2 is caused by the six upper keys +B, +B, A Zu, -b -I-Z) (Fig. 1) of the row 11, said keys being denoted hereinafter the main keys. The by-keys 13 are able to be depressed upon introducing amounts received and paid out only. When this takes place they cause an account totalizer to be thrown in also, to which the amount received or paid out is transmitted additively. The account totalizers are subdivided into two groups, the group influenced by the by-keys 1 to 9 and 19- to 23 being allotted to the amounts regroup influenced by the bykeys 10 to 18 and 24' to 27 to the amounts paid out.

In order to introduce the old state in tne machine, after depressing the corresponding amount keys 10 and account keys`17 one of the keys -B and +B is depressed and, namely, the key +B if it is a matter of a positive value, and the key +B if it is a matter of a negative one. Hereby the motor key M is released and the operation of the makeys Zu orAb, respectively.

v mechanism. In case the key H l set amount thus chine is started b depressing this key, the being transmitted to the main totalizer, the corresponding transaction totalizer -B or +B and to the printing and display mechanism.. A transmission of the set amount to the auxiliary totalizer does not take place even in case the key HR is being depressed.

In order to introduce amounts received or paid out, after setting this amoiintby means of the amount keys '10, the by-key 13 determining the kind-of said amount, the motor key M is released by depressing the main During the op eration of the machine caused by the motor M, the set amount is transmitted additively or substractively to the main totalizer and additively tothetransaction totalizer Zu or Ab, to they-account totalizer thrown into operation and to the printingiand display is being d pressed., then at thesame time the additive or subtractive transmission to the auxiliary totalizer takes place. i

This operation of the machine maybe followed by any required member of operationsrecording amounts received or paid out.

With the third mode of operation the total contained in the main totalizer is taken. According to whether `thetotal is a positive or a ne ative one, the mainkey -b or +5 is locke -v There are further provided means causing one of the ke s -b or +b to be able to be depressed only i no amount key is being set. By depressing the ke -b -or- +12 the motor key M is released. 'ring the operation now following the main totalizer is zeroized and the total contained therein is transmitted additively to the corresponding transaction totalizer V- b or b and the printing'and display mechanism is positioned. A transmission to the auxiliary totaliz'er does not take place even in c ase the key HB. is be- -in depressed. Y

ile the amount keys 10, the main keys, the key ,RZ and the keys ZS, ES are released at the end of each o eration of the machine the keys HR (auxiliary totalizer) and N (addenda) permanently remain set. They are released by the keys L disposed below and above them, respectively.` The account keys 17 set on the beginning of an ordinary transaction are released only at the end thereof, viz. after the new state of account has -been printed. A A

II. As the main totalizer is zeroized at the end of any ordinary transaction, a sub-total is able to be taken from the main totalizeronly after an amount received or paid out has been recorded. Bydepressingthe key RZ (sub-total of the main totalizer) the motor key M is released, such depressing being posy sible only if no amount key lbeing depressed.

Upon .starting the machine, the transmission of the sub-total from the main totalizer onto `the keys the Aprinting and display mechanism takes place. In case this sub-total is a negative one, the machine adjusts itself automatically in the described manner for taking negative totals. y

III. If from one of the six transactiontotalizcrs -B, +B, Ab, Zu, -b, +b, from the auxilia totalizer or from oneof the account tota izers the total is to be taken, one of the keysZS (sub-totals) -or ES (grand totals) is first depressed, ythis being possible ony i none, of the amount keys is bein depressed. rl depressing the keys ES an y ZS,

and the by-keys 13 which generally do not cause the release of the motor key M, become releasing keys for the motor key as this is permanently the ,case with the main keys. If now one of the main keys is depressed, or one of the by-keys or the key HR, the motor key Mis released. With thc operation started by said ke M, the subtotal or grand total is taken Y rom the totalizer selected by depressing said main or bykey or the key HR. '.x

IV. The key N (addenda) has to be de- .pressed in' case.ordinary transactions'are to be recorded as addenda, as hereinafter described in detail. With the addendum key N depressed, all the totallizers are thrown out of operation except the main totalizer. The

. record of an ordinary transaction is therethe rest, the mode of function of the machine is the same as in an ordinary transaction.

3. The setting mechmlsms Each row of the shafts-25 of the keys 10 (Figs. 2 and 4) has mounted beside it on rolls 26, 27 two bars, namely a locking 'har 28 (Fig. 2) and a block barv 29 (Fig. 4)', said bars cooperating with pins 30 `mounted on the key shafts 25. .Within the range of each key pin 30 the locking bar has a hook-shaped part 31 and normallyetakes, under the action ofa spring 33, its lower end position in which it abuts against the guiding roll 26. .The keys are mounted for horizontal shifting motion in a key b'oard 34 and in bent-off portions of partitions 36.` Springs 37 wound on their shafts will keep them in their left-hand end position. f- Y Upon' depressing one of the keys 10 the bar 28 is pushed upwardly by the pin 30 engaging the oblique face of the hook-shaped porreleased in the well-known manner with the upward motion of the b-ar 28.

' A bow 39 is mounted on a fixed shaft 38 and is guided along prolongations 40 of the bars 28. rIhis bow 39 carries on one side a roll 41 which is pressed by a spring against a'cam disk 43 fixed on the shaft 42. This shaft 42 executes a revolution in anti-clockwise direction upon cach operation of the machine. At the end of this revolution the cam of the disk 43 will engage the roll 41 and rock the bow 39 in clockwise direction, whereby all of the locking bars undergo an upward motion causingthe release of the set keys. In order to release the set keys by hand, a general releasing key 44 is to be depressed (Fig. 1) which imparts to the bow 39 the rocking motion in clockwise direction required for the upward motion of the bar 28 in a manner not shown. Another bow 46 likewise mounted on the shaft 38 and provided with a roll 45 abuts against a cam disk 47 fixed on the shaft 42 under the action of a spring. Upon rotating the cam disk 47 the cross portion of the bow 46 engages over the hook-shaped lugs 48 of the bars 28 and keeps the latter in their lower end positions so that all of the keys are locked in their positions.

Above the roll 27 there is mounted in the frame of the machine a shaft 49 (Figs. 2 and to which are rigidly connected arms 55 projecting into the range of the upper prolongations 5() of the bars 28. rIhe shaft 49 is able to be rocked by the action of certain special keys, whereby the arms 55 engage over the prolongations 50 and cause a locking of the keys, like the bow 46.

The block bar 29, Fig. 4, shiftably mounted beside the bar 28 on the rolls 26, 27 shows V- shaped recesses the oblique faces 56 of which cooperate with the key pins 30. A pin 58 of a lever 59 pivoted on the partition 36 engages a 'slot 57, Fig. 2, in block bar 29, the other end of said lever abutting against a pin 60 of a zero locking lever 62. This lever is pivoted on a shaft 61 and is acted upon in clockwise direction by a spring 51, see Fig. 3. A notch l63 of this lever 62 normally projects into the path of a pin 64 which is fixed on the differential member 65 belonging to the key row in question, said lever 62 locking the member 65 in zero position. A spring 66 attached between the frame of the machine and the lever 59 normally keeps the block bar 29 in its lower end position., Upon depressing a key the block bar 29 will be upwardly shifted by the pin 30engaging the oblique face 56, whereby an anti-clockwise rocking motion is imparted to the zero locking lever 62 which thus releasesthe differential member in consideration.

In -order'to release, with taking totals, all the members 65 before the beginning of the differential operation, there is mounted on the shaft 61 i bow 67 4which engages behind lower prolongations 52 of the zero locking levers 62 and moves the notches 63 of said levers 62 out of the path of the, pins 64 by an anti-clockwise rocking motion taking place with a rotation of the shaft 61.

The special differential mechanism (Fig. 5) is of a construction similar to that of the amount differential mechanism. It cooperates with the totalizer controlling mechanism and the printing mechanism. In correspondence with the five rows of keys 11, 13, 12 (Fig. 1) the special differential mechanismI shows five groups of differential elements. The differential member allotted to the keys 1l is denoted by 251 (Fig. 5),-that allotted to the keys 13 by 253, and that allotted to the keys 12 by 252. The differential .members carrying pins 64 cooperating with Zero pawls 62 influenced by springs 51 whereby said members are held in their position at rest as long as no key of the row in question is being depressed. Among the keys 12 only those denoted by N, ZS and ES cooperate with the differential member 252, so that the differential member 252 is able to assume, besides the zero position, still three other differential positions only. The keys L and M are without influence on the pawls 62 of this row of keys. The same is the case as to the key L of the row of keys 11 to the differential member 251. y The detent and releasing means of the special settting mechanism is described below. In the setting mechanism for the account members each account key 17 cooperates by means of a pin 590 (Fig. 4) with blockand locking-bars 591, 592 arranged on the side of the row of keys in consideration. These bars are designed like the bars 28, 29 (Fig. 4) of the amount setting mechanism. The stems 589 of the keys 17 control the positioning of differential shafts 587 connected with the type wheels for the account numbers.

4. The cey/ blocking means Blocking means are provided between the keys 10, 11, 12, 13, 17 and M (Fig. 1) compelling the operator to make'all the setting operations belonging to a transaction, before the operation of the machine is released and preventing him from making other setting operations than those belonging to this transaction. 'Ihese means further cause the different records of an ordinary transaction to be made in the prescribed succession only, they "further effect that during an ordinary transaction only the records of second and fourth order can be made and that amounts to be set and occurring again in succeeding records of the machine, need to be set one time only.

The whole means serving for the abovementioned purposes are of the following four kinds: Means for releasing the keys, means for mutually blocking the keys, means for determining the setting succession in one 1,es9,1se

termining the setting succession of the difl ferent records of a transaction.

'5. The key releasing means vkeys rushing back by spring action, ',into

`.their position of rest., As Ito. the amount keys, the releasing bow 39-rocking about the shaft 38 (Figs. 2, 12) effects the eleasing motion o the locking bars 28 (Fig. 2)- in the manner described 1n chapter 2.

The shaft 38 (Figs. 12, 5) extends to the right up to belowthe key boards of the transaction keys and has there loosely mounted on it a releasing bow 891`engag1ng by a roll 892 (Fig. 5) ,a `cam disk 89s (Figs. 5, 12)' fixed to the-driving shaft 42. The bow 891 cooperates with lower prolongations 40 of -a locking bar 901 (Fig. 23) for the keys -B t RZ of the row 11 and of locking bars 894 (Fig. 24)-, 895 25), 896 (Fig. 27) for the by-keys 13 andpwith a locking bar 898 (Fig. 30) for the keys ES, ZS. The disk 893 (Flgs: 5,- 12) is of a shape like that of the disk 43 (F1g.2) so that the releaseof said amount and transaction keys takes place at the sarne time, at the end ofl each operation. As in the amount setting mechanism the said locking bars are guided by end slots on rolls and bars 26,- 27. Springs v899 (Figs. 24, 27) Lcause them to yieldingly abut on said rolls and bars. u(

The relase of the keys HR and N does not take place by means of the driving mech-v anism, butby means of ialv releasing keys s L. The lkeys HR and mi the row 11 cooperate'witha locking bar 900 (Fig. 21) acted upon by'a spring 899. this bar 900 does not show the lower-prolongation 40, it is not influenced by the releasing'bow 891. Upon the key HR being depressed, the bar 900 engages with its hook portion `56 over a bar 905 connected as hereinafter described to the key HR, and `locks the same in its set position, until the key L is depressed. This key L cooperates,`b" a bar 905;?with atapered surface 907 of the ocking bar-(900 and takes the hook portion 56 out of the path of thebar 905-of 4 the key HR, the latterthus rushing back into itsposition of rest. If the key L is left after the key has ben released, it returns by spring action to its position of rest.

In a similar manner cooperate the keys N key frame. The shaft 911 is ca able of being shifted axially land is norma y held b a spring 912 in its left-hand end position i 12) In this position an arm 913 of said sha 911 so cooperates with an arm 914 (Figs. 12, 14) of the releasing bow 891 `that on every releasing motion of said bowthe bow 910 likewise receives a (releasing motion and re-` leases the set account keys 17.

As in an ordinary transaction the account number remains the same during the different o rations of the machine, its release takesI p ace, in order to obviate a repeated setting thereof, only at the end of the whole transf action viz. after the impression of the new state of account effected-by depressing the keys +5, -`b has been made., At the begin ning of the first operation of a record of first order the frame formed by the shaft 911 and the bow 910 is laterally shifted Yby means hereinafter described, so that the arm 913 of the shaft 911 comes out ofthe path of the arm 914 of the bow 891 and a release of the account keys' is revented. Only after deressing one o the keys b, +b the ls aid rame is `again brought back into its normal `and L with a locking bar 908 (Fig. 30) The another key of the'same'row. This is the A case also with the account keys 17. Wrongly depressed amount keys can be released before starting the operation of the machine, by the general .releasing key'44 (F' 1),denoted by L, while wrongly depresselg account keys 17 can be released 4b the general releasing key 18 (Fig. 1); e key 18 co0p crates by its shaft v915 (Fi 12, 13) with a prolongation .916 of the rznglS asing bow 910.

` 6. The mutual bloclcing'o)l the keys of a row The rows of the-transaction keys are provided with detent devices which cause generally one key only of a row'to be able tobe depressed. -These detent devices are forme-d,

in a well-known manner, by detentV disks 917 (Fig. 23) which are mounted on two supports 918 (Figs. 7, 9) arranged on the leftand side of the rows of keys, and cooperate withpins 902 of the 'shafts ofthe keys. The

whole space between said disks 917 is so'chosen that one .of the pins 902 only is capable vof entering between the disksso that asimul- 'las taneous depression of two or more keys is rendered impossible.

In the row o f keys 11 said pins 902 are not xed on the "keys 11 themselves but on blind keys 920 (Figs. 7, 9, 14) which are guided like the keys 11 in partitions 921 of the key frame and possess neither the hand nor cooperate by their feet with dierential members of the transaction totalizer.

The blind keys 920 are connected to the keys 11 by means of a frame which is formed bya bow 922 Figs. 7, 14) rotatably mounted by pins 923 Fig. 14) on the partitions 921, and by the bar 905 rigidly connected to said bow. The bar 905 engages by both ends slots 925 of the keys 11 and of the blind keys 920, as illustrated with one blind key in Fig. 9. By the described connection the blind keys 920 are compelled to take part in all movements of the keys 11 so that the detent ldevice 917, 918 arranged on the left-hand side of the blind keys is operative also for the keys 11.

As it will be seen from Figures 7 and 23, the keys HR and L of the row 11 are not subject to the detent action of the device 917, 918.

As the key HR has to cause the auxiliary totalizer also to the thrown-in for desired number of transactions, this key must be able to be depressed together with another key 11. The detent disks are therefore arranged between the upper seven keys only.

As to the row 12, the detent device 917, 918

(Fig. 7) works between the keys N, ZS, ES

so that if the key N is being depressed, no totals can be taken from the control totalizers and, if one of the total keys ZS, ES is being depressed, no addenda can be recorded.

7. Looking the keys Zu-ring operation of the machine By .depressing the motor key M (Fig. 31) all the keys are locked, the circuit for the driving motor is closed and the operation of the machine is initiated.

The shaft 505 (Fig. 31) of the motor key M has mounted on it a pin 926 which engages a slot 927 of an arm 929 fixed on the bow 928. The bow 928 which is loosely mounted onthe rod 483 extends to the left up to the righthand side of the amount keys (Fig. 3) and shows there a .downwardly directed 'arm 930 to which is articulated a thrust bar 931 (Figs. 3, 31) cooperating with the cam disk 47 of the locking bow 46 (Figs. 3 and 2) for the amount keys. The disk 47 is mounted for limited rotation on the shaft 42 by means of a slot 932 (Fig. 3) provided on its hub and of a pin 933 fixed in the shaft 42. Another pin 934 (Figs. 3, 31) arranged on the right-hand side of sai-d disk 47 is able to cooperate witl. the end` of the thrust bar 931. This bar is laterally held by a disk 935 fixed on the hub of the disk 47.

The bow 928 shows on its right-hand end (Fig. 5) an arm 936 corresponding to the arm 930 and having pivoted to it a thrust bar 937 (Figs. 12, 3l). This latter cooperates with a pin 938 (Fig. 31) of a disk 939 formed like the disk 47 and mounted for limited rota,

tion on the shaft 42 by means of a slot and pin connection 940, 941 (Fig. 5). The Abar 937 is laterally guided by means of a disk 942. A roll 943 (Figs. 31, 12) of a locking bow 944, for the transaction keys, loosely mounted on the shaft 38 cooperates with said disk 939. The bow 944 is acted upon in clockwise direction by a spring 945 (Figs. 5, 24) and is able to cooperate with lugs 946 of the locking bar 901 (Fig. 23) for the keys B to RZ, of locking bar 900 (Fig. 21) for the key HR, of locking bars 894 (Fig. 24), 895 (Fig. 25) and 896 (Fig. 27) for the by-keys 13, and 898, 908 (Fig. 30) for the keys 12.

When the machine is in position of rest, the rolls 45 and 943 (Fig. 31) are located in the deep portions of the disks 47 and 939, whereby the lugs 48 (Fig. 2) and 946 (Figs. 24 to 27) and therewith the corresponding keys are being released by the locking bows 46 and 944. If now the motor key M is depressed, the bow 928 (Fig. 3l) rotates in clockwise direction, the thrust bars 931, 937 move forwards (Fig. 31) and impart a partial rotation to the disks 47, 939 in anti-clockwise direction so that the rolls 45, 943 come oppositefthe full circumferential portion of said disks, the locking bows 46, 944 engage the 'lugs 48 (Fig. 2), 946 (Fig. 24) of the locking bars and all the amount and transaction keys are locked in their set and rest positions, respectively. During the operation of the machine the Akeys remain locked, as the shaft 42 upon its rotation takes along with it the disks 47, 939 by means of the pins 933 (Fig. 3) and 941 (Fig. 5) and the disks turn, during their rotation, their full portion t0 the rolls 45, 943. At the e-nd of the operation of the machine, shortly before the releasing moftion of the releasing bows 39 (Fig. 2) and 891 (Fig. 30), the deep portion of the disks reaches below the rolls 45, 943 (Fig. 31). This portion is engaged by the rolls of the locking bows under the action of their springs so that the key locking bars are released. As soon as the ascending section of the deep circumferential portion of the disks reaches the rolls, this being the case shortly before the revolutionof the shaft 42 is completed and when the disks have reached their initial position, said disks are stopped.

The locking bars 591 (Fig. 14) of the account keys show lugs 947 which cooperate with a locking bow 950 mounted on the frame by means of arms 948 (Figs. 14, 12) and a shaft 949. The right-hand arm 948 shows a .rearward prolongation 955 having a pin 956. On this pin rests one arm of an an le lever 958 loosely mounted on theshaft 95 (Figs. 12, 14). The upper arm of said angle lever 958 abuts against a projection 959 of the locki110r bow 944 of the transaction keys. It is .evident that upon each locking motion of the bow 944 the bow 950 is likewise turned into locking position by the angle level` 958 so 

